BAND-STRUCTURE IN RB-78

A level scheme is proposed for Rb78, which was obtained through the Zn64(O16,np) reaction at 44 and 52 MeV, by measuring - coincidences and -ray angular distributions. The isotopic identification was made by studying on- and off-beam spectra at selected time intervals, and determining the intensities of the different decay products. The main part of the level scheme comprises a I=1 band which shows a staggering similar to that previously found in Br76 and Kr77. In addition the level energies are very close to those in Br76. It was not possible to establish in a conclusive manner whether the lowest state of the proposed level scheme corresponds to one or the other of the hitherto known 6 and 17.5 min isomers in Rb78, but the first possibility appears to be the more likely one. NUCLEAR REACTIONS Zn64(O16,np), E=44 and 52 MeV; measured (E,),E,I,- coin. Rb78 deduced levels, I. Enriched Zn64 target. © 1979 The American Physical Society.